Documentation pages
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3473000. -->
Reported by: [jonathan1055](https://www.drupal.org/user/92645)
Related to !406 !328 !319 !281 !255
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>This project has its own <a href="https://project.pages.drupalcode.org/gitlab_templates/">documentation pages</a> with content maintained in the code repository, and built via Gitlab Pages and MkDocs. Some of these pages have been reviewed and updated, but others still need expanding and improving. This issue continues the work from <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-7"><a href="https://www.drupal.org/project/gitlab_templates/issues/3439644" title="Status: Closed (fixed)">#3439644: Review all documentation pages</a></span></p>
<h3 id="summary-nothing">Pages that have been reviewed and updated</h3>
<p><a href="https://project.pages.drupalcode.org/gitlab_templates/index">index</a></p>
<p><a href="https://project.pages.drupalcode.org/gitlab_templates/info/testing-mrs/">info/testing MRs</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/info/templates-version/">info/templates-version</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/info/common/#viewing-environment-variables">info/common/#viewing-environment-variables</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/info/drupal7/">info/drupal7</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/info/variants/">info/variants</a></p>
<p><a href="https://project.pages.drupalcode.org/gitlab_templates/jobs/cspell/">jobs/cspell</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/jobs/eslint/">jobs/eslint</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/jobs/stylelint/">jobs/stylelint</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/jobs/test-only-changes/">jobs/test-only-changes</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/jobs/phpunit/">jobs/phpunit</a><br>
<a href="https://project.pages.drupalcode.org/gitlab_templates/jobs/phpstan/">jobs/phpstan</a></p>
<h3 id="original-documentation">Original documentation on drupal.org</h3>
<p>The project originally had documentation only on <a href="https://www.drupal.org/docs/develop/git/using-gitlab-to-contribute-to-drupal/gitlab-ci">this drupal.org page</a>. This page can remain, but some sections and details are duplicated in the project pages. This needs reviewing and stream-lining, because they may be out of date. Reducing duplication is good.</p>
> Related issue: [Issue #3502875](https://www.drupal.org/node/3502875)
> Related issue: [Issue #3492951](https://www.drupal.org/node/3492951)
> Related issue: [Issue #3426311](https://www.drupal.org/node/3426311)
> Related issue: [Issue #3439644](https://www.drupal.org/node/3439644)
issue